Alteration filingSep 17
DOB filing M01100366-A1
Alteration filing at 31 Union Square West
Under review16 proposed stories
Open filing Building record · BIN 1078701
31 Union Square West
31 Union Square West, Manhattan, NY 10003
A consolidated, filing-by-filing view of DOB records matched to this building identifier. The current snapshot links 2 independently sourced records, including 1 that are not recorded as completed, closed or withdrawn.
newyorkdailyStreet Futures
BUILDING RECORD · BIN 1078701
31 Union Square West
Midtown South-Flatiron-Union Square, Manhattan
A consolidated public-record view · updated Sep 17, 2026
- DOB filings
- 2
- Active-status
- 1
- Recorded addresses
- 1
A building-level summary of matched filings, active-status records and published identifiers.
Matched filings2
Open or active-status records1
First included filingOct 16, 2024
Latest recorded changeSep 17, 2026
The lot
What is already here?
The lot holds a 16-story elevator apartment building built in 1902, with 82 homes, on a 7,175 sq ft lot.
- Floors 2–16Homes82 homes are recorded on this lot — about 5 homes to a floor, and the apartments assessed on this block run to a typical 2,125 sq ft (197 m²). The city does not publish which floor any of them is on.
- Floor 1Street levelStreet level. The lot is recorded as mixed residential and commercial, so this floor is where the commercial space is.
- Street levelMixed residential and commercial
- Homes82 recorded · typically 197 m² · valued $1,095,608
- Above the southern skylineFrom about floor 17 — the tallest thing within 60 m to the south is 50.9 m
- Built
- 1902
- Floors
- 16
- Residential units
- 82
- Building type
- Elevator apartment building
- Land use
- Mixed residential and commercial
- Zoning district
- C6-2A
- Lot area
- 7,175 sq ft
- Building area
- 138,800 sq ft
Housing violations
24 violations are open against this address under the Housing Maintenance Code. 1 of them is the class the city calls immediately hazardous.
- 1Immediately hazardous
- 9Hazardous
- 14Non-hazardous
- 0Information order
Open means the Department of Housing Preservation and Development has not recorded it as corrected, which is not the same as nobody having fixed it. The city publishes the apartment each was written against; that is not carried here, because a count says a building has a problem and an apartment number says whose.
The apartments
18 condominium apartments are assessed on this block, and the typical one is 2,125 sq ft (197 m²). They run from 85 to 234 m².
The city values the typical one at $1,095,608. That is the Department of Finance’s market valuation for tax, not an asking price and not a sale.
What it sold for
3 apartments on this tax block changed hands in the year the city last published, at a median of $1,875,000, from 1,800,000 to 2,830,000.
Recorded sale prices from the Department of Finance’s rolling file, covering the year to Aug 31, 2026. Transfers under $10,000 are left out: New York records deed transfers between relatives at a dollar, and those are not sales. No apartment number and no name is carried from either side.
Owner of record
HARTFORD PROPERTIES 41 LLC
As the assessment roll records it. Only owners that read as a company are shown here; where the roll names an individual, nothing is published.
Lot facts come from NYC Department of City Planning, Primary Land Use Tax Lot Output (PLUTO) (64uk-42ks), accessed Sep 22, 2026. They describe the tax lot, not any single filing. When the rest of New York went up
Violation record
Are there open violations here?
The Department of Buildings has 6 open notices on record for this building, out of 73 notices on file; the most recent was issued Jun 20, 2023.
- Low pressure boiler
Issued Jun 20, 2023 — VIOLATION ISSUED-FAILURE TO FILE 2019 EXTERNAL LOW PRESSURE INSPECTION
- Low pressure boiler
Issued Jun 20, 2023 — VIOLATION ISSUED-FAILURE TO FILE 2018 EXTERNAL LOW PRESSURE INSPECTION
- No report and / or late filing (facade)
Issued May 31, 2018 — FAILED TO FILE FISP CYCLE 8A TECHNICAL REPORT BY 02/21/2017
3 further open notices are on file. Open the source dataset for the full list.
Open means the agency has not recorded a resolution, which is not the same as the problem still existing. What a violation is, and what it is not. From NYC Department of Buildings, DOB Violations (3h2n-5cm9), accessed Sep 19, 2026.
What is recorded here
Multiple filings, one stable building identifier.
New York City's Building Identification Number helps connect filings that may use different application numbers or describe different scopes of work. The records below are grouped because they publish BIN 1078701. They should not be read as a single construction project unless the underlying filings say so.
The matched set includes 2 alteration filing. Its latest status categories are 1 under review, 1 recorded as completed. Each filing page preserves its own status, dates, scope and source identifier.
- First included filing
- Oct 16, 2024
- Latest recorded change
- Sep 17, 2026
- Highest proposed story count
- 16 stories
- Highest proposed unit count
- 71 dwelling units
Highest recorded values may come from different filings and must not be combined into one proposed project. Open the individual filings below for their exact scope. Values outside the publication's conservative data-quality bounds are withheld pending source review.
Address alerts
Watch this address.
Get an email when NewYorkDaily detects a material change in the public DOB records associated with 31 Union Square West.
Confirmation is required. Alerts describe source-data changes, not confirmed construction activity. Unsubscribe at any time. Privacy
Recorded history
What has happened at this address?
Every dated event the city has published for this building, from all 2 matched filings, in the order it was recorded. A date marks what entered the public record, not what happened on site.
- Alteration filed01
New interior & exterior renovations with associated demolition to an existing commercial retail structure. concrete on metal pan stairs,structural support for new fixturesand mechanical equipment. new exterior ramp filed under separate application. Filing M01100366-S2.
- Alteration approved02
Filing M01100366-S2 reached an approved status.
- Permit recorded for alteration03
DOB lists a first permit date for M01100366-S2. That is not by itself confirmation of activity on site.
- Alteration signed off04
DOB recorded a sign-off for M01100366-S2.
- Alteration now completed05
The latest status recorded for M01100366-S2 is “LOC Issued.”
- Alteration filed06
Plumbing work in conjunction with flight club tenant fit-out, new restroom and kitchen fixtures. Filing M01100366-A1.
- Alteration now under review07
The latest status recorded for M01100366-A1 is “Plan Examiner Review.”